Benzoate degradation by an anaerobic, syntrophic bacterium, strain SB, in coculture with Desulfovibrio strain G-11 reached a threshold value which depended on the amount of acetate added, and ranged from about 2.5 to 29.9 (mu)M. Increasing acetate concent...
National Technical Information Service (NTIS)
The polyvinyl acetate added was considered as a solvent of the solution, and to compare this with polyvinyl acetate, an equivalent amount of ethyl acetate, which had the same structure as the monomer unit of polyvinyl acetate, was used. The rate of the free radical production of ethyl ...
Energy Citations Database
Enthalpies of transfer between heavy and normal water for several compounds which serve as model compounds for cellulose-cellulose acetate reverse osmosis membranes were determined from heats of solution and dilution measured calorimetrically. The compoun...
Kluyveromyces marxianus is capable of converting lactose into ethyl acetate offering a chance for an economical reuse of whey. The microbial formation of ethyl acetate as a bulk product calls for an aerobic process and, thus, the highly volatile ethyl acetate is discharged from the aerated bioreactor. This stripping process was modeled ...
PubMed
Calcium content in the food is known to affect lead metabolism but lead changes some parameters of calcium metabolism. The total calcium transfer through the duodenal wall was significantly decreased in rats treated with certain doses of lead acetate, while the active transport was not influenced by the same lead doses. The purpose of ...
... Title : THE INFLUENCE OF PROCESSING VARIABLES ON THE DESALINATION CHARACTERISTICS OF LOW FLUX CELLULOSE ACETATE ...
DTIC Science & Technology
Five-week-old female albino rats were given daily doses for 1 or 2 weeks of lead as acetate ranging from 2 $mu$g to 40 mg by gastric intubation and sacrificed on the 8th or 15th day of the experiment. Calcium-45 and $sup 85$Sr were used as markers to assess the calcium and strontium transfer through the duodenal wall by the everted gut sac method ...
... Page 4. EXPLAINING AND INFLUENCING CHINESE ARMS TRANSFERS ... EXPLAINING AND INFLUENCING CHINESE ARMS TRANSFERS ...
The first paper of this series (see AD-646 329) reported kinetic studies of the oxidation of p-methoxytoluene by manganeic acetate, which suggested strongly that the reaction is an electron-transfer type. The reactions between manganic acetate and anisole...
Acetate kinase catalyzes the reversible magnesium-dependent synthesis of acetyl phosphate by transfer of the ATP ?-phosphoryl group to acetate. Inspection of the crystal structure of the Methanosarcina thermophila enzyme containing only ADP revealed a solvent-accessible hydrophobic pocket formed by residues ...
PubMed Central
... Accession Number : ADD404828. Title : Influence of fillers on ethylene-vinyl acetate copolymer degradation. Corporate ...
-4500 Acetate kinase catalyzes the magnesium-dependent transfer of the -phosphate of ATP to acetate. The re. Acetate kinase, which catalyzes the magnesium-dependent transfer of the ATP -phosphate to acetate (Eq. 2 to bind the nucleotide -phosphate, resulted in vari- ants ...
E-print Network
Benzoate degradation by an anaerobic, syntrophic bacterium, strain SB, in coculture with Desulfovibrio strain G-11 reached a threshold value which depended on the amount of acetate added, and ranged from about 2.5 to 29.9 {mu}M. Increasing acetate concentrations also uncompetitively inhibited benzoate degradation. The apparent V{sub max} and K{sub m} for ...
... Title : Large Amplitude Vibrational Influence on Electron Transfer Reactions. ... observation of vibrational promotion of an electron transfer reaction. ...
The presence of methanogens Methanobacterium arboriphilus, Methanobacterium bryantii, or Methanobrevibacter smithii increased the level of cellulose fermentation by 5 to 10% in cultures of several genera of anaerobic fungi. When Neocallimastix sp. strain L2 was grown in coculture with methanogens the rate of cellulose fermentation also increased relative to that for pure cultures of the fungus. ...
Kinetic studies of the oxidations of 1- and 2-methoxynaphthalene by manganic acetate in acetic acid are reported. Both reactions follow the kinetic scheme established for the analogous oxidation of p-methoxytoluene, indicating that the first step involves...
A new approach to separate furfural from aqueous waste has been investigated. Recovery of furfural and acetic acid from aqueous effluents of a paper mill has successfully been applied on an industrial scale since 1981. The process is based on the extraction of furfural and acetic acid by the solvent trooctylphosphineoxide (TOPO). Common extraction of both ...
A combination of adsorption and calorimetric measurements was made to study structuring of water at cellulose acetate surfaces of varying polarity. In this work cellulose acetate powders with varying degrees of acetylation were used. The results obtained ...
Factors influencing the rate and extent of benzoate degradation by the anaerobic syntrophic consortia were studied. Nonlinear regression analysis showed that the cause of the benzoate threshold was not a diminished benzoate degradation capacity. Analysis of cocultures with hydrogen users that differed in their hydrogen utilization capacities showed that the threshold did not ...
DOE Information Bridge
Chlorophyll a was incorporated into cellulose acetate films and the triplet decay and electron transfer to p-benzoquinone in aqueous solution was studied using laser flash photolysis and ESR. The triplet was found to decay by first order kinetics with the...
The introduction of different functional substituents in the molecule of acetals has a very strong influence on their capacity for adding to vinyl alkyl ethers. The authors studied acetals of fatty series and also of different ethylene, acetylene, aromati...
... Descriptors : *COMPLEX COMPOUNDS, *IRON COMPOUNDS, *ELECTRON TRANSFER, *ACETATES, *MAGNETIC MATERIALS, MAGNETIC ...
The effects of environmental parameters on chlorophyll triplet quenching and electron transfer to quinones have been investigated in a system consisting of donor and acceptor incorporated into a cellulose acetate film which was subsequently exposed to solvent. Triplet quenching by a diffusional mechanism was found to occur in the dry film, with steric ...
... Title : The Influence of Ocean Waves on Radiative Transfer in the Earth's Atmosphere and Ocean. Descriptive Note : Technical rept. no. 6,. ...
... Title : Influence of Mass and Heat Transfer on the Corrosion Embrittlement of Metals in a Gaseous Medium,. ... Pagination or Media Count : 4. ...
... Title : Influence of Heat and Momentum Transfers Between Thermal Plasma Jets and Stabilized Zirconia Particulates on the Thermomechanical ...
Excitation energy transfer between the dye pair acriflavine (donor) to rhodamine-6G (acceptor) in various polymers [polyvinyl alcohol (PVA), cellulose acetate, and polymethyl methacrylate (PMMA)] was studied using steady-state and time-resolved fluorescence spectroscopy at room temperature. In all these polymers, at higher acceptor concentrations, direct ...
... channels for transferring knowledge might be considered a knowledge transfer fertile ... transferred than one that has few because both agency ...
Quantitative insights into the stress-transfer mechanisms that determine the mechanical properties of tunicate cellulose whisker/poly(vinyl acetate) nanocomposites were gained by Raman spectroscopy. The extent of stress-transfer is influenced by local orientation (or anisotropy) of the whiskers, which in turn is ...
Liquid film and diffusional resistance of brewery granules during acetate, propionate, and ethanol utilization were investigated. Substrate utilization rate increased with decreased granule size. Effectiveness factors for acetate, propionate, and ethanol were calculated by comparing the maximum rates of substrate utilization of whole granules (1.8 to 3.0 ...
The influence of different anions on the binding and oxidation of manganous and ferrous cations was studied in four mutants of bacterial reaction centers that can bind and oxidize these metal ions. Light-minus-dark difference optical and electron paramagnetic resonance spectroscopies were applied to monitor electron transfer from bound divalent metal ions ...
AbstractThe influence of different anions on the binding and oxidation of manganous and ferrous cations was studied in four mutants of bacterial reaction centers that can bind and oxidize these metal ions. Light-minus-dark difference optical and electron paramagnetic resonance spectroscopies were applied to monitor electron transfer from bound divalent ...
Poly(vinyl acetate)-b-polystyrene, poly(vinyl acetate)-b-poly(methyl acrylate) and poly(vinyl acetate)-b-poly(methyl methacrylate) block copolymers with low polydispersity (M(w)/M(n) < 1.25) were prepared by successive reversible addition-fragmentation chain transfer (RAFT) polymerization and atom ...
... Change in the color of dyed acetate rayon cloth was found to be correlated to the concentration of nitrogen dioxide, and that of dyed knitting wool to ...
... FATS, *FATTY ACIDS, ACETALS, BLOOD, LABELED SUBSTANCES, LABORATORY ANIMALS, LIPIDS, LIPOPROTEINS, LIVER, RADIOACTIVE ...
... low concentrations of alpha-ionone and its relation to adsorption time in olfactometers; the concentration response function for amyl acetate in the ...
An acetate-fermenting strain of Methanosarcina was isolated from an acetate enrichment culture inoculated with anaerobic sludge from a waste treatment digestor. In pure culture, this organism fermented acetate in the absence of added hydrogen at rates comparable in magnitude to those found in digestor systems. This rate was ...
... Title : On the Influence of the Thickness and Thermal Properties of Heating Walls on the Heat Transfer Coefficient in Nucleate Boiling. ...
... Title : A SIMPLIFIED APPROACH TO THE INFLUENCE OF GORTLER-TYPE VORTICES ON THE HEAT TRANSFER FROM A WALL. ...
The biological effects in vitro and in vivo of acetate as the main dialysate buffer have been well documented since the introduction of bicarbonate dialysis in the late 1970s. Bicarbonate dialysis solutions have become the standard but still contain 3-5 mmol/L of acetate for chemical stability. This is an important controversy given the recent introduction ...
Measurements have been made of the transfer of the transition metal cations Cr exp 3+ , Fe exp 2+ , Co exp 2+ , Ni exp 2+ from molten cesium acetate-sodium acetate-potassium acetate eutectic (50-25-25 mol%, mp approx. 90 exp 0 C) into dodecane solutions c...
Electronic absorption spectra of crystals and solutions of praseodymium and thulium acetates and dipicolinates are reported. The influence of spectral properties of both ligands on intensities of the f - f transitions in the crystals studied is discussed. In the near-IR region, overtone vibrations of ligands are strongly coupled with the f - f transitions, ...
NASA Astrophysics Data System (ADS)
The major goal has been to develop a sensitive and reproducible assay for plasma acetate. This has been achieved: Plasma is deproteinized, acidified, subjected to low temperature high vacuum vapor transfer, and gas chromatographed on Chromasorb 101 coated...
The pathway of acetate conversion to methane and carbon dioxide was studied in Methanosarcina strain TM-1. It was shown that the methyl group of acetate was transferred to coenzyme M which unequivocally demonstrates that methyl coenzyme M is an intermedia...
Imidazole - functionalized surfactant 1 transfers acetyl groups from p-nitrophenyl acetate to cholesterol (2) in vesicular coaggregates. Acetyl surfactant 1-Ac is an intermediate, and cholesteryl acetate (3) is the product. The system mimics the human enz...
